作　　者： (许河峰）; (范晓东）; (张淑华）;

机构地区： 西北工业大学理学院,陕西西安710072

出　　处： 《化学与生物工程》 2017年第9期61-63,共3页

摘　　要： 采用数码照相、红外光谱和热重分析等方法对银牙(鱼或)耳石的形貌、结构与组成进行了表征。结果表明:银牙(鱼或)耳石有数个圆形晶状突,背面没有主凹槽;红外光谱在1 479cm^(-1)处的极强吸收峰属碳酸盐特征峰,在1 082cm^(-1)和854cm^(-1)处的次强吸收峰为霰石型CaCO_3晶体;热重分析表明银牙(鱼或)耳石的热分解存在晶隙层间水的挥发、有机物的分解与碳化和CaCO_3热分解为二氧化碳与氧化钙等3个阶段,其中含CaCO_3 98.16%,另含层间水、其它无机盐、有机化合物等组成1.84%。为丰富鱼类化学生物学分类数据库,建立基于耳石研究的鱼类分类新方向——耳石理化评价的化学计量学提供帮助。 We characterized the morphology, structure, and chemical composition of otoliths from Otolithes argenteus by digital cammera,infrared spectroscopy, and thermogravimetric analysis. The results showed that otoliths from Otolithes argenteus had several rounded crystalline tubers without main groove on the back. The strongest absorption peak at 1 479 cm-1 of FTIR spectrum was related to carbonate structure, and absorption peaks at 1 082 cm-1 and 854 cm-1 could come from vaterite calcium carbonate crystal. Thermogravimetric analysis showed that the thermal decomposition of otoliths from Otolithes argenteus comprised three stages： evaporation of crystal interlayer water, decomposition and carbonization of organic matters, and calcium carbonate decomposed into carbon dioxide and calcium oxide. The otolith contained 98.16% calcium carbonate, 1.84% interlayer water, other inorganic salts and organic compounds. The study can help to enrich the database of fish chemicobiology classification,and establish chemometrics of direction of fish classification based on the otolith research.

关 键 词： 耳石 组构 银牙 鱼或 红外光谱 热重分析